Like many things that have to do with bear safety, when everything is going as planned it’s not that hard.
Fence setup can be time consuming in tall grass and brush, unless you spend a lot of time clearing; otherwise the vegetation will draw too much current. Clear, rocky flats and you can’t get the posts staked very well. Not a big deal for a car or horse camp where a saw might be handy and you’re unlikely to move it. For a mobile backpack camp not the same. Still a great option to have absolutely, but it’s never as easy as it looks on TV…